Right ... But that is producing even funkier results... doing pow( (1-(1+$nMonthlyInterest)) , ($iMonths*-1) ) ; Gives me : 4.2502451372964E-35 = 25000 * (0.0010416666666667 / 6.1270975733019E+35); -- Stephen Johnson c | eh The Lone Coder http://www.thelonecoder.com continuing the struggle against bad code http://www.fortheloveofgeeks.com I¹m a geek and I¹m OK! -- > From: Eric Gorr <mailist@xxxxxxxxxxxx> > > I believe what you are looking is: > > http://us2.php.net/manual/en/function.pow.php > > number pow ( number $base , number $exp ) > Returns base raised to the power of exp > > > > On Sep 19, 2008, at 3:34 PM, Stephen Johnson wrote: > >> OK.. Math is NOT my forte ... >> >> I am converting a site from ASP to PHP ... And this calc is in the >> ASP Code >> : >> >> $nMonthlyInterest = $nRate / (12 * 100) >> >> //' Calculate monthly payment >> $nPayment = $nPrincipal * ( $nMonthlyInterest / (1 - (1 + >> $nMonthlyInterest) ^ -$iMonths)) >> >> Which then gives me in PHP >> 0.0010416666666667 = 1.25 / (12 * 100); >> -2.1701388888889 = 25000 * ( 0.0010416666666667 / (1 - (1 + >> 0.0010416666666667) ^ -12)) :: >> >> ^ is the problem ... >> >> The solution SHOULD be 2,097.47 ... Not 2.17 >> >> Would be willing to help correct this and make it valid in PHP? > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
